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発行:日本スポーツパフォーマンス学会 (Japan Society of Sports Performance Research) Online Edition: ISSN 2187-1787 
  updated 2017/5/13  
1657 間欠的な全力ペダリングテスト時の発揮パワーによる柔道選手の瞬発力および持久力の評価
佐藤雄太(日本スポーツ振興センター), 森寿仁(立命館大学), 奥島大(神戸芸術工科大学), 小山田和行(鹿屋体育大学), 藤田英二(鹿屋体育大学), 山本正嘉(鹿屋体育大学)


Assessing explosive and endurance power of judokas with an intermittent sprint pedaling test
Two studies were conducted with male university judokas, aiming to identify a simple method for assessing judoka’s explosive and endurance power by using an intermittent sprint pedaling test with a bicycle ergometer. In Study 1, 10 sets of repeating tests were conducted, with 5 seconds of sprint pedaling and 10 seconds of rest. Participants were 22 students who had been classified by their coach into two groups in terms of their explosive power, with 14 participants in the higher group and 8 in the lower group. Likewise, for the endurance power, 10 participants were classified into the higher group, and 12 into the lower group. The results of the explosive power assessed by pedaling were different from the coach’s assessment, but the results for the endurance assessed by pedaling were similar to the pre-test assessment by the coach. In Study 2, 7 participants engaged in judo matches for a maximum of 5 minutes. Drawn matches were extracted, and blood lactic acid (BLa) was measured. These results were compared with those from the pedaling test in Study 1. The values were almost equal, 13mmol/L. The present results suggest that the intermittent sprint pedaling test is not relevant for assessment of judokas’ explosive power, but that it may be useful for assessment of their endurance power. Furthermore, this exercise could be used to train judokas who need to improve their endurance power.
1651 走幅跳における傾斜ボックスを用いた踏切動作の改善事例−意図的な動作改善が苦手な大学女子走幅跳競技者の指導実践より


Improvement of the takeoff motion in the long jump after practice with an inclined box: an unskilled university woman jumper
The present study examined the feasibility of improving the record of a university woman long jumper whose results in jumping competitions had failed to improve due to her using an incorrect takeoff motion that depended too much on her knees. She used a new training method for her takeoff that changed her motion so that it depended on her hips rather than her knees. After of 6 months of training with this method, she acquired the new takeoff motion, and her results in the long jump improved from 5.39 m to 5.61 m. Furthermore, the rhythm of her approach on the runway and her aerial form also improved. These results suggest that the new training method may be a useful way for jumpers to acquire a hip-dependent takeoff and to improve their takeoff motion in the long jump more generally.
1655 平台車を用いた体幹トレーニングが体幹筋群の筋厚に及ぼす影響−陸上競技における跳躍・混成種目を専門とする競技者を対象として


Effects on trunk muscles of training with a flat dolly: athletes specialized in jumping and composite events
The present study aimed to examine effects of training the trunk of the body, using a flat dolly, on the thickness of the trunk muscles. The participants were male student athletes who specialized in jumping and composite events at track and field competitions. The training was conducted twice a week for three months, from December, 2015, to February, 2016, for a total of 20 times. In the training, a flat dolly was used for 18 types of trunk training. The muscles measured were the abdominal rectus muscle, the external abdominal oblique muscle, the internal abdominal oblique muscle, and the transverse abdominal muscle. For the abdominal rectus muscle only, measurements were made at three points: under the second, third, and fourth tendinous intersections. In order to have a measure of effects of the training on the muscles, a two-element within-subject design was used. The results of an analysis of variance revealed that the main effects of measurement time and measurement location were significant, as was the interaction. The main effect of measurement time was significant at each location measured. The thickness of all muscles measured increased significantly after the training. The amount of change in the muscles after the training was significantly higher in the transverse abdominal muscle than in the abdominal rectus and internal abdominal oblique muscles. These results suggest that the proposed method of training with a flat dolly may be effective for increasing the thickness of the trunk muscles.
1549 大学野球選手における30m 全力疾走中のピッチとストライドの特徴
蔭山雅洋(鹿屋体育大学), 土川千尋(リアルフィジカルトレーナーズ), 大石祥寛(鹿屋体育大学), 鈴木智晴(鹿屋体育大学), 藤井雅文(鹿屋体育大学), 前田明(鹿屋体育大学)

本研究の目的は, 大学野球選手の30m 全力疾走中におけるピッチとストライドの特徴を明らかにすることに加え, ポジション別の違いから野球選手の30 m 走の特徴を検討することとした. 被検者は, 大学野球選手36 名 (年齢: 20.3 ± 0.9 yr, 身長: 173.7 ± 5.0 cm, 体重: 68.9 ± 5.5 kg) であった. 被検者全員に対し, 30m 全力走を実施し, 5m 毎のタイムを計測した. また5m 毎に, 疾走速度, ピッチとストライドを算出した. その結果, 野球選手の30 m 走は, 10 m を通過するまでピッチとストライドがともに増加, 10-15 m 区間ではピッチを維持しながらストライドが増加, 15-25 m 区間ではピッチとストライドを維持, 25-30 m ではピッチが減少しストライドが増加した. また30 m 走における疾走速度は, 0-30 m および10-15 m 区間のピッチと有意な正の相関関係 (p < 0.05) を示した. そして30m 走タイムは, 外野手, 内野手, 投手の順に短く, 外野手は投手よりも有意に短かった (p < 0.05). これらの結果より, 野球選手の走力は, 攻撃場面においてより重要な役割を果たす内野手や外野手が投手よりも優れており, 30 m 走が速い野球選手は, ピッチが一定となる10-15 m の区間にピッチを増加させることで効果的な加速を生み出すことが明らかとなった.

Pitch and stride of university baseball players in the 30 meter dash
The present study aimed to identify features of the pitch and stride of university baseball players when running a 30-meter dash, and differences in running style in relation to the players’ positions. The participants, 36 university baseball players (age: 20.3±0.9; height: 173.7±5.0 cm; weight: 68.9±5.5 kg), ran a 30-meter dash. Their time was measured every 5 meters, and their running speed, pitch, and stride were calculated. The results indicated that both their pitch and their stride increased in the first 10-meter section. After that, their pitch was unchanged, whereas their stride increased in the 10- to 15-meter section; both pitch and stride remained unchanged during the 15-to 25-meter section. Finally, their pitch decreased while their stride increased in the 25-to 30-meter section. The players’ running speed was significantly positively correlated (p<.05) with pitch in the 30-meter dash as a whole and also in the 10- to 15-meter section. Running time was shorter in the order of outfielders, infielders, and pitchers, and the outfielders’ time was significantly shorter than that of the pitchers (p<.05). These results suggest that the running ability of outfielders is superior to that of infielders and pitchers who play a more important role in offense, and that baseball players who run a fast 30-meter dash accelerate effectively by increasing their pitch in the 10- to 15-meter section, where pitch tends to be stabilized.
1645 下肢始動の正面打突動作を意識した一過性のトレーニングが剣道鍛錬者の打突と踏み込みの時間差に及ぼす影響


Brief training on a leg-initiation frontal strike in kendo in order to diminish the time gap between strike and step-in
Ki-ken-tai-ichi (unity of spirit, sword, and body) is essential for making effective strikes in kendo, and harmonizing the motion of the arms and legs is also required. With respect to the timing of strike with the arms and step-in by the legs, beginners tend to step in first and then strike, whereas experts strike first and then step in. Recently, young kendoka tend to make too much effort, so that there is a large time gap between strike and step-in. The present study examined effects and usefulness of changing the striking method to a leg-initiation type, in order to diminish the time gap between strike and step-in when frontal striking. The participants were 60 university kendoka of 3- to 4-dan level; the trainer was a 7-dan kendo expert. He first gave a lecture and demonstration, then conducted once-thru training for 30 minutes to correct the participants’ method of striking. An immediate effect of a significantly diminished time gap between strike and step-in was obtained. This effect was greater in those kendoka who had had a bigger time gap. This suggests that the leg-initiation strike may be useful for diminishing the time gap between strike and step-in. Also, it is possible that acquisition of (and habituation to) the leg-initiation strike may make it possible for kendoka to acquire the basic motion of men technique by unifying offense and strike against the opponent.
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第3回 日本スポーツパフォーマンス学会大会
2017年7月25日 東京ビッグサイト

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